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runtime: convert worldIsStopped to atomic type

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For #53821

Change-Id: I246b65ddb1171d2cab42f98092c64f20ecef392a
Reviewed-on: https://go-review.googlesource.com/c/go/+/425778
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
cuiweixie 2022-08-26 10:41:32 +08:00 committed by Michael Pratt
parent 0d6a7f9d2e
commit 301ca7513f
1 changed files with 4 additions and 4 deletions
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8
src/runtime/lockrank_on.go
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@ -13,7 +13,7 @@ import (
// worldIsStopped is accessed atomically to track world-stops. 1 == world
// stopped.
var worldIsStopped uint32
var worldIsStopped atomic.Uint32
// lockRankStruct is embedded in mutex
type lockRankStruct struct {
@ -301,7 +301,7 @@ func assertRankHeld(r lockRank) {
//
//go:nosplit
func worldStopped() {
if stopped := atomic.Xadd(&worldIsStopped, 1); stopped != 1 {
if stopped := worldIsStopped.Add(1); stopped != 1 {
systemstack(func() {
print("world stop count=", stopped, "\n")
throw("recursive world stop")
@ -317,7 +317,7 @@ func worldStopped() {
//
//go:nosplit
func worldStarted() {
if stopped := atomic.Xadd(&worldIsStopped, -1); stopped != 0 {
if stopped := worldIsStopped.Add(-1); stopped != 0 {
systemstack(func() {
print("world stop count=", stopped, "\n")
throw("released non-stopped world stop")
@ -329,7 +329,7 @@ func worldStarted() {
//
//go:nosplit
func checkWorldStopped() bool {
stopped := atomic.Load(&worldIsStopped)
stopped := worldIsStopped.Load()
if stopped > 1 {
systemstack(func() {
print("inconsistent world stop count=", stopped, "\n")